Loose leaf binder



June 14, 1938, R ROSEN 2,120,648

LOOSE LEAF BINDER Filed July 50, I936 inhuman INVENTOR Rub/n R0520 A ZJ. Q

ATTORNEY Patented June 14, 1938 UNITED STAES 'ATENT QFFE LOOSE LEAF BINDER Rubin Rosen, Brooklyn, N. Y.

Application July 30, 1936, Serial No. 93,345

2 Claims.

The invention relates to loose-leaf binders and more particularly to binders of the post type.

Withbinders of this type now in common use the posts are secured to one of the leaf-engaging members and the other leaf-engaging member is locked to the posts by a more or less complicated mechanism involving the use of a key to release the movable leaf-engaging member for the insertion or removal of sheets from the book.

It thus becomes a time consuming operation to remove or insert sheets and should the key become lost or misplaced it is impossible for the book to function for the purpose for which it was designed.

The principal object of the present invention is to provide a loose-leaf post binder to overcome the foregoing serious objections. The binder is of extreme simplicity and is therefore economical to manufacture and can be operated with the greatest of ease when it is desired to remove or insert sheets.

Other objects and advantages will become apparent as this specification proceeds. Referring to the drawing forming a part thereof and in which one embodiment of the invention is illustrated.

Fig. 1 is an end elevation with parts broken out and parts in section, the binder being in its closed position;

Fig. 2 is a detail sectional view taken in a plane parallel to that of Fig. 1, on a larger scale and showing the parts in a position they would assume when inserting or removing sheets;

Fig. 3 is a fragmentary detail sectional view taken at right angles to Fig. 2;

Figs. 4 and 5 are detail cross sectional views taken on the lines 4-4 and 5-5 respectively of Fig. 2;

Fig. 6 is a fragmentary detail perspective view of the lower part of the upper telescoping member; and

Fig. '7 is a detail perspective view of one of the parts.

Fig. 8 is a perspective view of an alternate construction.

Referring again to said drawing the reference numeral l0 designates the lower or what might be termed the stationary leaf-engaging member. This member H3 is flexibly connected at II to its cover l2 in a conventional manner well known in the art.

Suitably mounted in the leaf-engaging member In is a stationary sleeve 13. As illustrated the sleeve I3 is provided with a threaded boss M on its lower end and this boss engages an interiorly threaded aperture in the leaf-engaging member ID. Means are provided and will later be described for removing the sleeve I3. Practically the only time it is necessary to remove the sleeve E3 is when one desires to insert additional lengthening members to accommodate a large number of sheets.

A stationary screw I5 is mounted in axial alignment with the sleeve l3. As shown the lower end of this screw is secured in the boss [4 by a pin I6. Obviously the means for securing the screw H5 in position may be widely varied. The sides of the screw l5 are slabbed off or flattened as indicated at El and threaded or otherwise secured to the upper end of the screw 5 is a head l8. under side of the head I8 is provided with a boss having its sides slabbed off or flattened to form lugs or tongues l9 as particularly illustrated in Figs. 4 and 7.

The movable leaf-engaging member 20 has the customary flexible portion 2| securing the leafengaging member 20 to its cover 22. This leafengaging member 20 carries a telescoping sleeve 23. Secured to the upper end of the sleeve 23 by a set-screw 24 is the operating knob 25. The sleeve 23 has a washer or flange 26 and the leafengaging member 20 is confined between the flange 2G and the knob 25, it being understood that the sleeve may be freely rotated in relation to the leaf-engaging member 20.

The closed end of the lower part of the sleeve 23 forms what might be termed a nut, see Figs. 5 and 6. The thread 21 of this nut is interrupted by two out out portions 28. These cut out portions 28 are of substantially the same cross-sectional area as the tongues l9 formed on the head l8. A spring 30 is interposed between the head IB and the top of the sleeve 23.

When it is desired to remove the stationary sleeve l3 for purposes heretofore mentioned the openings 28 are brought into engagement with the tongues'l9 and the knob 25 may then be rotated and the threaded boss l4 thus easily removed from its socket in the leaf-engaging member Iii. In order to insure against unscrewing the head l8 off the end of the screw l5 when the stationary sleeve 1 3 is being removed the threads in the head l8 are what is termed a tight thread and those in the cover In for the reception of the boss 14 are a loose thread.

The telescoping sleeve 23 and the stationary sleeve I3 thus provide a post. While the post has been spoken of heretofore as in the singular it is to be understood that as many of such posts as desired may be utilized in a loose-leaf binder.

The

In use the binder normally occupies the position of Fig. 1, the spring 30 being compressed and the telescoping sleeve 23 being slid down into the stationary sleeve l3. Naturally the amount of the compression of the spring and the relation of position between the sleeves will depend upon the number of sheets in the binder. In the position of Fig. 1 the threaded portions of the stud l5 will be engaging the interrupted threads 2'! of the telescoping sleeve nut. The parts are thus locked in position and it is impossible to remove any sheets from the binder.

When it is desired to remove sheets or add sheets the only operation necessary is to turn the knobs 25 approximately This disengages the interrupted threads 2'! from the threaded portions of the stud I5 and the spring 30 will instantly raise the leaf-engaging member 20 to approximately the position of Fig. 2 or higher making the sheets and binding posts readily accessible. After the new sheets have been added or some old sheets removed the leaf-engaging member 20 is pushed downwardly and the knobs 25 are again turned approximately 90 and the parts are all locked in position. The sheets 3| may be notched in the conventional manner as indicated at 32 to permit of their easy removal or insertion.

Referring to Fig. 8 the screw [5 is provided with longitudinal stops 35 located diametrically opposite each other at the junctures of the threaded portions and flattened faces. When the parts are in the position of Figs. 2 and 5 the leaf-engaging members as heretofore explained are free to move away from each other and when it is desired to lock the leaf-engaging members the knob 25 is rotated approximately 90. The stops 35 will prevent further movement of the nut .at the end of the sleeve 23 in relation to the screw I5 and will thus insure against inadvertently turning the knob 25 too much and releasing the parts.

I claim:

1. A loose-leaf binder having in combination a stationary leaf-engaging member, a sleeve carried by said member, a movable leaf-engaging member, a rotatable sleeve carried by said movable leaf-engaging member, said sleeve carried by said movable leaf-engaging member being adapted to telescope within the sleeve carried by said stationary leaf-engaging member, a knob secured to the outer end of the sleeve carried by said movable leaf-engaging member for rotating said sleeve, a stud secured to and in axial alignment.

with the sleeve carried by said stationary leafengaging member, said stud being threaded and having slabbed off or flattened sides, longitudinal stops on said stud, said stops being located diametrically opposite each other at the juncture of the threaded portions and flattened faces, a nut formed in the sleeve carried by said movable leaf-engaging member, said nut having cut out portions so that the threads thereof are interrupted, and spring means interposed between said stud and the upper part of the sleeve carried by said movable leaf-engaging member, said spring means normally urging said leaf-en gaging members away from each other, the arrangement being such that when the threaded portions of said stud align with the interrupted portions of the thread of said nut the spring means Will force the leaf-engaging members away from each other and when the sleeve is rotated by said knob the threaded portions of said stud will engage the threads of said nut to lock the leaf-engaging members. from movement in relation to each other.

2. A loose-leaf binder having in combination a stationary leaf-engaging member, a sleeve carried by said member, a movable leaf-engaging member, a rotatable sleeve carried bysaid movable leaf-engaging member, said sleeve carried by said movable leaf-engaging member being adapted to telescope within the sleeve carried by said stationary leaf-engaging member, a knob secured to the outer end of the sleeve carried by said movable leaf-engaging member for rotating said sleeve,-a stud secured to and in axial alignment with the sleeve carried by said stationary leafengaging member, said stud being threaded and having slabbed oif or flattened sides, a nut formed in the sleeve carried by said movable leaf-engaging member, said nut having cut out portions so that the threads thereof are interrupted, a head" secured to the upper end of said stud, lugs formed on the under side of said head, said lugs being adapted to engage the cut out portion of said nut so as to permit of said stud being rotated, and spring means interposed between the head of said stud and the upper part of the sleeve carried by said movable leaf-engaging member, said spring means normally urging said leaf-engaging members away from each other, the arrangement being such that when the threaded portions of said stud align with the interrupted portions of the thread of said nut the spring means will force the leaf-engaging members away from each other and when the sleeve is rotated by said knob the threaded portions of said stud will engage the thread of said nut to lock the leafengaging members from movement in relation to each other.

RUBIN ROSEN. 

